Purification of carbon nanotubes via selective heating
First Claim
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1. A method for purifying a layer of carbon nanotubes comprising:
- providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein said precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes;
covering said precursor layer of carbon nanotubes with a thermocapillary resist, wherein said thermocapillary resist is in thermal contact with at least a portion of said carbon nanotubes;
selectively heating said first carbon nanotubes, thereby causing thermocapillary flow of said thermocapillary resist away from said first carbon nanotubes to expose said first carbon nanotubes; and
separating said first carbon nanotubes from said second carbon nanotubes, thereby generating a purified layer of carbon nanotubes.
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Abstract
The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.
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Citations
59 Claims
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1. A method for purifying a layer of carbon nanotubes comprising:
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providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein said precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; covering said precursor layer of carbon nanotubes with a thermocapillary resist, wherein said thermocapillary resist is in thermal contact with at least a portion of said carbon nanotubes; selectively heating said first carbon nanotubes, thereby causing thermocapillary flow of said thermocapillary resist away from said first carbon nanotubes to expose said first carbon nanotubes; and separating said first carbon nanotubes from said second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A method for making an electronic device comprising:
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providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein said precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; covering said precursor layer of carbon nanotubes with a thermocapillary resist, wherein said thermocapillary resist is in thermal contact with at least a portion of said carbon nanotubes; selectively heating said first carbon nanotubes, thereby causing thermocapillary flow of said thermocapillary resist away from said first carbon nanotubes to expose said first carbon nanotubes; separating said first carbon nanotubes from said second carbon nanotubes, thereby generating a purified layer of carbon nanotubes; and providing one or more device component structures in electrical or physical contact with said purified layer of carbon nanotubes, thereby making said electronic device.
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Specification